Records in A390108.

Terms

a(0) =0a(1) =2a(2) =20a(3) =46a(4) =296a(5) =582a(6) =2664a(7) =3557a(8) =4140a(9) =8270a(10) =11328a(11) =18326a(12) =21796a(13) =25250a(14) =49036a(15) =59870a(16) =106302